With my previous network setups, I managed my network by connecting to the internal IP address of my router (e.g. 192.168.1.1).
I recently switched to google fiber and installed their "fiber box" (a combined router/modem, as I understand it) in place of my old modem and router. Connecting directly to the router's IP adress now presents a very minimal page that directs me to https://fiber.google.com/myfiber/ to manage my internal network settings. It is this external page that allows me to do things like assign static IP addresses and modify WiFi settings.
Is this something I should be concerned about, or is it just as secure as managing network settings "internally"? If there are risks, how can I mitigate them?